private static Nodes.Expression Term()
{
Nodes.Expression left = Deg();
while (Lexer.LookAhead().LexType == Lexer.LexType.Multiply || Lexer.LookAhead().LexType == Lexer.LexType.Divide)
{
if (Lexer.LookAhead().LexType == Lexer.LexType.Multiply)
{
Lexer.NextLexem();
Nodes.Expression right = Deg();
left = new Nodes.BinaryOperation(Nodes.BinaryOperation.TypeOfOperations.Multiply, left, right);
}
else
if (Lexer.LookAhead().LexType == Lexer.LexType.Divide)
{
Lexer.NextLexem();
Nodes.Expression right = Deg();
left = new Nodes.BinaryOperation(Nodes.BinaryOperation.TypeOfOperations.Division, left, right);
}
}
return left;
/*StringBuilder result = Deg();
Lexer.Lexem currLexem = Lexer.LookAhead();
while (true)
{
if (currLexem.LexType == Lexer.LexType.Divide)
{
Lexer.NextLexem();
result.Append(Lexer.Space);
result.Append(Deg());
result.Append(Lexer.Space);
result.Append(Lexer.Divide);
}
else
if (currLexem.LexType == Lexer.LexType.Multiply)
{
Lexer.NextLexem();
result.Append(Lexer.Space);
result.Append(Deg());
result.Append(Lexer.Space);
result.Append(Lexer.Multiply);
}
else
break;
currLexem = Lexer.LookAhead();
}
return result;*/
/*Nodes.Expression left = Deg();
Lexer.Lexem currLexem = Lexer.LookAhead();
if (currLexem.LexType == Lexer.LexType.Multiply)
{
Lexer.NextLexem();
return new Nodes.BinaryOperation(Nodes.BinaryOperation.TypeOfOperations.Multiply, left, Term());
}
if (currLexem.LexType == Lexer.LexType.Divide)
{
Lexer.NextLexem();
return new Nodes.BinaryOperation(Nodes.BinaryOperation.TypeOfOperations.Division, left, Term());
}*/
}
private static Nodes.Expression Expr()
{
Nodes.Node.Coords coords = Lexer.Coords;
Nodes.Expression left = Term();
while (Lexer.LookAhead().LexType == Lexer.LexType.Add || Lexer.LookAhead().LexType == Lexer.LexType.Minus)
{
if (Lexer.LookAhead().LexType == Lexer.LexType.Add)
{
Lexer.NextLexem();
Nodes.Expression right = Term();
left = new Nodes.BinaryOperation(Nodes.BinaryOperation.TypeOfOperations.Add, left, right);
}
else
if (Lexer.LookAhead().LexType == Lexer.LexType.Minus)
{
Lexer.NextLexem();
Nodes.Expression right = Term();
left = new Nodes.BinaryOperation(Nodes.BinaryOperation.TypeOfOperations.Minus, left, right);
}
}
left.Coords = coords;
return left;
}